Brake mechanism for motor vehicles



Fens. 1924. 1,482,816 D. H. SCHALL.

BRAKE MECHANISM FOR MOTOR VEHICLES m au v (kuma,

Feb. 5,1924, Y 1,482,816

- D. H. SCHALL BRAKE MECHANISM FOR MOTOR VEHICLES Filed Omit-L1,v )922I 4 Sheets-Sheet 2 bmw Feb.. 5 1924.

D. H. SCHALL l BRAKE MECHANISM Fon MOTOR VEHICLES Filed Oct 4, 1.922 4 Sheets-Sheet 5 Feb. 5 1924.

n. H. scHALL.

BRAKE MECHANISM FOR MOTOR VEHICLES Filed 0015. 4 1922 4 sheets-sheet 4 Patented Feb. 5, i924.

DAVID H. SCHALL,

or CANTON, OHIO.

BRAKE MECHANISM FOR MOTOR VEHICLES.

Application filed October 4,

To all whom t may concern:

Be it known that I, DAVID H. SGHALL, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented new and useful Improvements in Brake Mechanism for Motor Vehicles, of which the following is a specification. j

In carrying out the present invention it is my purpose to provide a brake mechanism for motor vehicles which will embody both a service brake and an emergency bra-ke and wherein the brake bands will be so arranged upon the respective drums as to grip the drums evenly and uniformly around the entire circumference of the drum when the bands are contracted or actuated to braking position, thereby insuring a smooth application of the brakes and preventing a locking of the brake bands to the drums and the resultant skidding of the wheels.

It is also my purpose to improve and simplify the general construction of brake mechanism for motor vehicles'- and to provide a brake mechanism wherein the parts will be readily accessible, so that access maybe had thereto for the purposes of replacement and repair.

Furthermore, I aim to provide bra-ke mechanism which will embody comparatively few parts, and these so arranged and correlated as to reduce the possibility` of derangement to a minimum.

With the above recited objects in view, and others of a similar nature, the invention resides in the construction, combination and arrangement of parts set forth in and falling within the scope of the appended claims.

In the accompanying drawings:

Figure 1 is a transverse. sectional view through the brake mechanism constructed in accordance with my invention.

Figure 2 is a view partly in section and partly in elevation.

Figure 3 is ay view in elevation opposite from Figure 2.

Figures 4 and 5 are detail views of the cam devices for contracting the brake bands.

Figure 6 is an enlarged sectional view on the line 6-6 of Figure 2. j

Referring now to the drawings in detail, 1 designates the outer end portion of oney end of the rear axle housing of the motor 1922. serial No. 592,262.

vehicle and 2 the wheel hub journaled upon the outer end portion of the axle housing 1 and equipped with the usual spokes 3 that radiate from the hub and carry the wheel felly.

In accordance with my invention I fix to the inner side of the spokes 3 of the wheel a brake drum 4 that is arranged concentrically of the axis of the wheel. This brake drum 4 embodies a disk-like plate 5 that is fastened to the spokes of the wheel by bolts 6 and has its outer edge formed integral with an annular flange 7 that constitutes the braking element of the drum. Within the drum 4 is a second brake drum 8 arranged concentrically of the axis of the wheel and of the drum 4. This drum 8 comprises a disk-like plate 9 and a braking flange 10 formed integral with the outer edge of they disk 8 and at right angles thereto.

Encircling the axle housing l adjacent to the inner side of the wheel and spaced apart a short distance -therefrom is a collar 11 that is riveted, as at 12, to the axle housing or otherwise secured thereto and integral with the outer end of the collar 11 is a disk 13 that is arranged concentrically of the axle housing. Secured to the inner side of the disk 13 and spaced apart equal distances around the same are radial arms 14 that are riveted, as at 15, or otherwise secured to the disk 13.

The disk 13 and arms 14 carried by the axle housing are stationary, while the drums ,1- and 8 carried by the wheel revolve with such wheel. In the present instance, the arms 14 are four in number, and one projects upwardly, two laterally in relatively Opposite directions and one downwardly, as clearly shown in Figures 2 and 3 of the drawings. It is conceivable, however, that the positions of the arms may be changed as desired. The upwardly extending arm 14 adjacent to its upper end is equipped with outwardly extending studs 16, each of which is threaded into the arm, the lowermost one also being threaded into the disk 13, these studs being locked in adjusted positions by nuts 17. These studs 16 overlie the braking flanges of the drums 4 and 8, respectively, as clearly shown in Figure 1 of the drawings. Suspended irom the studs 16-16 are brake bands 18 and 19, respectively, that encircle the braking flanges 7 and 10. In

the present instance the brake band 18 at its topmost point has riveted thereto a loop 20 that eneircles the stud 1G and extending through the legs of the loop 20 is a leaf spring 21 that bears directly upon the pin l1G, so as to forni yieldable supporting means for the brake band 18. The brake band 19 at. its topmost point is equipped with iipwardly extending lugs 22 arranged at opposite sides of the stud 16 and through these lugs 22 is` passed a. leaf spring 23 that supports the brake band 19y yieldingly, The lugs 22 and loop 20 may be used interchangeably or both brake band supports may be alike, if desired.

llach b *alte band 18-l9 is of any suitable or preferred construction, and, as usual, embodies an outer metal band 24- and a brake lining 25 riveted or otherwise secured to the inner side of the metal band.

As clearly shown in Figures l and 5 of the drawings, each brake band 18-19 at its lower portion is split and one end of the split portion is turned upon itself, as at 26, and formed with a slot 27, while the other end of the split portion is formed with a. tongue 28 that extends into the slot 2T and liesv beneath the downturned portion 26. Pivoted to. the inner end of the tongue 28 is acain 29 equipped with alever 30. W hen the cam is in non-braking position, as shown in Figures f1 and 5 of the drawings, the brake bands are expanded, while when the canis .are in braking position the bands are contracted, the cams acting against the downturned end portions 26 when being pulled to braking position to contract the bands about the respective drums, so as to bring abouta braking action..

In the present inst-ance, the outer ends of the laterally extending arms 14C are equipped with pins 31 thatare arranged beyond the outer brake band 18. Over Lhe pins 31 engage leaf springs respectively. One end of each leaf spring is fastened to the brake band, as at 38, while the other end is slidably fitted in a keeper 8st that is fastened to `the brake. band by rivets Il() or other suitable fastening devices.

The inner brake band 19 is equipped with spring fingers at diainetrically opposite points, and these lingers 35 engage pins 8G that are carried by the disk 13. The spring fingers 35 and the leaf springs 32 carried bythe respectivebrake bands act to restore the brake bands to normal ornon-braking position when the brake ba-nds are relieved of' the action of the cams 29, as is readily apparent` from inspection of the drawings.

In practice, the cam lever Oassociated with the brake band 18 is connected to the service brake pedal, whiley the cam lever 30 of the brake band 19 is connected with the emergency brake lever, so that a service application of the brakes or an emergency application may be made whenever necessary or desired.

From the foregoing description, taken in connection with the accompanying drawings, it will be seen that. I have provided a brake mechanism for motor vehicles wherein the emergency brake is entirely separate and independent or" the service brake on each rear wheel of the vehicle, and whereby an en'iergency application or a service application, or both, may be effected quickly, so as to bring the cary toa standstill. uniformly andwithout danger of locking the brake bandsito the drums.

I have entered into a detailed description of the construction and relative arrangement of parts embraced in the present and preferred embodiment of my invention with a- View to imlnirtingv a full, clearv andeXact understanding of the said embodin'ient. I do not desire, however, to be understood as conlining myself to the said specific construction and relative arrangement of parts, inasmuchpas in the future practicey of my invention such changes or modifications may be made as fairly fall Withinthe scope of my invention as detinedby my appendedy claims.

IIa-ving thus. described the invention, what is claimed as new, is,:-

1. In a brake mechanism of the classr described, the combination with the rear axlev housing and the ground wheel journaled upon the outer end of said housing, ofvbrake drums secured to they inner side of said groundr4 wheel concentrically of the axis thereof and to each other, brake bands encircling said drums, respectively, means carried by the rear axle housing and support-k ingsaid brake.l bands about said drums,- each brake band being split at its lower portion and cainlevers` connected tothe split portions of said brake bands and operable tov contract the bands.

2. In a brake mechanisinof the class described, the combination with the rear axle hou-sing and the grou-nd wheel journaled upon the outer end of said housing, of brake drums secured to the inner side of said ground wheel concentrically of the axis thereof and toeach other, brake bands-encircling said drums, respectively, meanscarried by the rear axlehousing and supporting said brake.l bands-about said drums, each brake. bandbeing split at itsl lower portion, cam levers connected to theV split portions of said brake bands and operable to contract the bands, and spring elements carried by said brake bands to4 restore the same to nonbralring position subsequent to the action of saiducain levers.

3, In a brake mechanismof the class described, the combination with the rearaxle housing and the ground wheel journalcd upon the outer end of said housing, of brake drums secured to the inner side of said ground wheel concentrioally of the axis thereof and to each other, brake bands encircling said drums, respectively, means carried by the rear axle housing and supporting said brake bands about said drums, the lower portion oi each brake band being split and having one end downturned and slotted and the other end formed with a, tongue projecting through said slot and a Cain pivoted 10 upon the tongue behind said downturned end and operable to contract said band.

In testimony whereof I affix my si nature.

DAVID H. SC ALL. 

